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AUGUSTIN THOMA, AUGUSTIN F. THOMA, AND ALBIN THOMA, OF PIQUA, OHIO.

Leners Patenten. 67,462, 4@zaten August 6, 1867.

IMPROVEMENT FN INSTRUMENTS EUR SETTINGJEWELS.

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TO ALL WI-IOM IT MAY CONCERN:

Be it known that we, AUGUSTIN THOMA, AUGUSTIN F. THOMA, and ALBIN EIHOMA, of Piqua, in the county of Miami, and State of Ohio, have invented a new and improved Instrument for Opening the Settings of Jewels; and we do hereby declare that the following is a full, clear, andcxact description thereof, which willA enable others ,skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in whichi i Figure 1 is a side vi-ew of the instrument.

Figure is a section of a plate showing the manner of setting jewels.

Figure 3 is a. top view of the same.

Figure 4 is a. `cross-section of the jaws of the instrument.

Similar letters of reference indicate like parts.

This invention relates to an instrument for opening the settings of jewels inwatches or other articles which have been broken, the object of` which is to raise the bez`zel, after removing the old jewel, very carefully, without injury, so that another jewel may be set inthe place of the old or broken one. It consists in a. delicate pair of forceps or tongs, which close so that the steel points of which they are formed may be introduced ontside and under the bezzel which forms the capping around and over the jewel. By means of a screw operated on a spreading-rod between the jaws of the forceps, they are very gradually opened, so that the point-s lift and open the bezz el of the jewel, allowing another one te he setin its place. For jewellers and watchmakers this l instrument will be very convenient and useful.

In fig. 1, a is the handle of the instrument, to which is attached a pair of forceps or nippers with long steel jaws b b', which are made to spring close together at the points when at rest, and lie against each other at the lower part as far up as the top or upper side of little projections c on each side of the jaw b, which lap over the other jaw b. And between the jaws is placed a spreading-rod, d, which, at its upper end, passes up into a socket or recess in the handle a, and through a guide-bar, e, which unites the upper part of thejaws b b', and at the lower end is pointed or tapered. When the points of thejaws are closed t-he lower end of the rod d reaches the upper side of the projections c c. The upper end of the spreading-rod d is a screw ou which works a small burr or milled nut,f, placed between the guide-bar e and the lower end of the handle a.

It will be observed that when the spreading-rod is raised by screwing it up into the recess in the handle, the points of the jaws will close by their own spring action. When thejaws are closed their points may be placed in the setting of a. jewel; then, by turning the burr f, the taper-point of the spreading-rod d will ent-er und pass between thejaws b b and under the projections c c, which serve es guides, thereby gradually separating thejaws and opening the points of the instrument, so that the bezzel shall be evenly opened without injury. On one ot' the jaws of the instrument a. delicate notch, h, is cut at the point, which prevents thejaws from going through the settings or jumping-out of them.

Having described our invention and the mode of applying it, what we claim as new, and desire to secure by Letters Patent, is-

1. We claim the spring-jaws b b', in combination with the spreading-rod d connected with the handle a, con-.Y

structed and operating substantially as and for the purpose herein described.

2. We clainrthe notch h on the point of one of the jaws b bi', formed for the purpose herein specified.

AUGUSTIN THOMA, AUGUSTIN F. THOMA,

Witnesses: ALBIN THOMA.

A. BERTING, GEO. HOL'rznRMAnN, S. S. McKnNnn. 

